datasheet · note 5. cie (x,y) chromaticity. the x,y value is determined by measuring luminance at...
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LTTD240320035-L4-TF
Date: October 2012
Logic Technologies Part Number : LTTD240320035-L4-TF Issue Date : 16.10.2012 Version : 1.0
1/21
PRODUCT SPECIFICATION
DESCRIPTION
TFT Module – 3.5” QVGA 240 (RGB) x 320
Transflective
PART NUMBER LTTD240320035-L4-TF
VERSION 1.0
ROHS COMPLIANT
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Logic Technologies Part Number : LTTD240320035-L4-TF Issue Date : 16.10.2012 Version : 1.0
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Revision Status
Revision Revision Date Page Content Notes
1.0 16.10.2012 Initial release Mechanical same as
LTTD240320035-L3-TF, but IC change to ILI9341
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Table of Contents
GENERAL INFORMATION
MECHANICAL DIMENSIONS
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
BACKLIGHT CHARACTERISTICS
ELECTRO-OPTICAL CHARACTERISTICS
INTERFACE DESCRIPTION
BLOCK DIAGRAM
TIMING CHARACTERISTICS
RELIABILITY TESTING
INSPECTION CRITERIA
INSPECTION STANDARD
PRECAUTIONS FOR USING LCD MODULES
WARRANTY
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Logic Technologies Part Number : LTTD240320035-L4-TF Issue Date : 16.10.2012 Version : 1.0
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GENERAL INFORMATION
Item Contents Unit
LCD Type TFT Transflective, Normally white ---
Technology a-Si TFT -
Viewing Direction 6:00 O’clock Viewing Angle
(Gray Scale Inversion Direction) 12:00 O’clock
Module dimensions (W x H x T) 64.0x85.0x3.0 mm
Active area (W x H) 53.64x71.52 mm
Number of pixels 240(RGB) x 320 ---
Pixel pitch (W x H) 0.2235x0.2235 mm2
Colours 262K ---
Contrast ratio 150 (typical) Note
Backlight White LEDs (6 LEDs in series) ---
Backlight Brightness 100 nit ---
Interface RGB 6 bit+SPI ---
Operating temperature -20 to +70 °C
Storage temperature -30 to +80 °C
Note: Cr=150:1 is the data when backlight on. When backlight off, Cr=2.5:1
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Logic Technologies Part Number : LTTD240320035-L4-TF Issue Date : 16.10.2012 Version : 1.0
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MECHANICAL DIMENSIONS
GN
D50
B2
25G
ND
49B
324
GN
D48
B4
23G
ND
47B
522
R0
46G
ND
21R
145
SC
L20
R2
44G
ND
19R
343
SD
I18
R4
42S
DO
17R
541
GN
D16
GN
D40
CS
15G
039
GN
D14
G1
38G
ND
13G
237
GN
D12
G3
36R
ES
ET
11G
435
GN
D10
G5
34V
SY
NC
9G
ND
33G
ND
8D
CLK
32G
ND
7G
ND
31G
ND
6H
SY
NC
30V
SH
D5
GN
D29
GN
D4
EN
AB
28LE
DK
3B
027
GN
D2
B1
26LE
DA
1
1
3.30
25.50± 0.07
0.50± 0.10P0.5*(50-1)=24.50± 0.05
W=0.35± 0.03
A3:1
Thickness
A.A
.Centre
A
(17.00±1.00)
3.8856.44(B
ezelOpening)
3.5474.32(Bezel Opening.)
4.94
5.28
85.00± 0.30(Module OD)
64.00±0.30
(Module
OD
)71.52(Display A.A.)
53.64(Display
A.A
.)
(18.85)
3.5”QV
GA
TFT240
RG
BX
320R
esolution
60’C
lockview
ingD
irection
Transflective
LEDKLEDA
LED:1*6=6PCS
0.30±0.05
NO
TES
1. OP
ER
ATING
TEM
PE
RATU
RE
: -20degC to +70degC
2. STO
RA
GE
TEM
PE
RATU
RE
: -30degC to +80degC
3. VIE
WIN
GD
IRE
CTIO
N: 6 O
’CLO
CK
4. PO
LAR
ISE
RTY
PE
:TRA
NS
FLEC
TIVE
6. BA
CK
LIGH
T: WH
ITE LE
Dx6
7. RO
HS
CO
MP
LIAN
T8. G
EN
ER
AL TO
LER
AN
CE
: +/-0.3
5. DR
IVE
R IC
: ILI9341
Version:1.0
Pin
Assignm
ent
LTTD240320035-L4-TF
1
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Logic Technologies Part Number : LTTD240320035-L4-TF Issue Date : 16.10.2012 Version : 1.0
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ABSOLUTE MAXIMUM RATING
Parameter Symbol Min. Max. Unit Note
Analog supply voltage VSHD - 0.3 4.6 V ---
Logic supply voltage VIN - 0.3 VSHD+0.3 V ---
Logic output voltage VO - 0.3 VSHD+0.3 V ---
Driver supply voltage VGH-VGL - 0.3 +32.0 V ---
Backlight LED Forward Current IF --- 25 mA One LED
Operating Temperature TOPR - 20 70 °C ---
Storage temperature TST - 30 80 °C ---
ELECTRICAL CHARACTERISTICS (AGND = GND = 0V, Ta = 25°C)
Parameter Symbol Min Typ. Max Unit Remark
Supply Voltage VSHD 2.5 2.8 3.2 V ---
Gate On Voltage VGH 13.5 15.0 16.5 V
Gate Off Voltage VGL -11 -10 -9 V
Input Signal Voltage VIL 0 --- 0.3xVSHD V R0~R5, G0~G5,
B0~B5, DCLK, Hsync, Vsync,Reset,CS,SDI,
SCL,.ENABLE VIH 0.7xVSHD --- VSHD V
Current of supply voltage
IVSHD 15 25 mA VSHD=2.8V
IVGH 0.2 0.3 mA VGH=15.0V
IVGL 0.2 0.3 mA VGL=-10V
Power Consumption Pd 426 639 mW
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Logic Technologies Part Number : LTTD240320035-L4-TF Issue Date : 16.10.2012 Version : 1.0
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BACKLIGHT CHARACTERISTICS
Item Symbol Min. Typ. Max. Unit Condition
Forward Current IF --- 20 25 mA Notes
Forward Current Voltage VF --- 19.2 --- V Notes
LED Lifetime --- --- 20000 --- Hrs Notes
Power Consumption WBL --- 324 --- W Notes NOTES: Backlight drive conditions: constant current driving method.
The LED driving condition is defined for each LED module (6 LEDs in series). The LED driving condition is defined for total backlight consumption. Forward Voltage adjustment depends on the Forward Current setting. One LED : max IF = 25mA, VF = 3.3V The LED lifetime is typically 20,000 hours at 25degC I
F is defined for one channel LED.
If the LEDs are driven by high current, high ambient temperature & humidity condition the lifetime of the LEDs will be reduced.
Operating life means brightness reduces to 50% of initial brightness. Typical operating life time is estimated data.
ELECTRO-OPTICAL CHARACTERISTICS
Characteristics when backlight on
Item Symbol Condition Min. Typ. Max. Unit Refer Note
Response Time TON
Tc=25°C --- 15 20
Ms Fig 1 1 TOFF --- 20 25
Contrast ratio Cr
θ=0°
100 150 --- --- Fig 2 1
Uniformity U --- 75 --- % Fig 2 3
Surface Luminance Lv 80 100 --- cd/m2 Fig 2 2
Viewing Direction ratio Cr≥10
=90° --- 40 ---
--- Fig 3 6 =270° --- 55 ---
=0° --- 45 ---
=180° --- 45 ---
CIE (x,y) chromaticity White
x Backlight On
--- 0.301 --- --- Fig 2 5
y --- 0.321 ---
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Characteristics when backlight off
Optical performance should be evaluated at Ta=25℃ only.
NOTES
1. Contrast ratio (CR) is defined mathematically in Figure 2.
Contrast Ratio = Average Surface Luminance with all white pixels (P1, P2, P3, P4, P5) Average Surface Luminance with all black pixels (P1, P2, P3, P4, P5)
Note 2. Surface luminance is the LCD surface from the surface with all pixels displaying white. For more information see figure 2. Lv = Average Surface Luminance with all white pixels (P1, P2, P3, P4, P5…) Note 3. Uniformity of surface luminance,
White = Minimum Surface Luminance with all white pixels (P1, P2, P3, P4, P5) Maximum Surface Luminance with all white pixels (P1, P2, P3, P4, P5)
Note 4. Response time is the time required for the display to transition form white to black (rise time Tr) and from black to white (decay or fall time, Tf). The industry standard test equipment used is the Autronic-Melcher’s Conoscope.
Note 5. CIE (x,y) chromaticity. The x,y value is determined by measuring luminance at each test position 1 through 5, then calculating the average value. Note 6. The Viewing angle is the angle at which the contrast ratio is greater than 2. For a TFT module, the contrast ratio is greater than 10. The angles are determined for the horizontal or ‘x’ axis and the vertical or ‘y’ axis with respect to the ‘z’ axis, being the LCD surface reference. Also see figure 3. Note 7. For viewing angle and response time testing, the testing data is based on Autronic-Melcher’s BM-7A. For the contrast ratio, surface luminance, luminance uniformity and chromaticity (CIE), the test data is based on the industry’s standard SR-3A photo detector. Note 8. For TFT modules, grey scale reversing occurs in the direction of the panel viewing angle.
Item Symbol Condition Min. Typ. Max. Unit Refer Note
Response Time TON
Tc=25°C --- 15 20
Ms Fig 1 1 TOFF --- 20 25
Contrast ratio Cr θ=0° 2 2.5 --- --- Fig 2 1
Viewing Direction ratio Cr≥2
=90° --- 35 ---
--- Fig 3 6 =270° --- 40 ---
=0° --- 35 ---
=180° --- 35 ---
CIE (x,y) chromaticity White
x Backlight On
--- 0.310 --- --- Fig 2 5 y --- 0.320 ---
Reflectance --- 5.5 --- % Fig 1 6
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Logic Technologies Part Number : LTTD240320035-L4-TF Issue Date : 16.10.2012 Version : 1.0
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Figure 1. Definition of response time
white black white
Tr Tf
Op
tica
l
Re
sp
on
se
010%
90%100%
Figure 2. Measuring contrast ratio, surface luminance, luminance uniformity and CIE (chromaticity).
A : 5mm, B : 5mm, H & V : Active area. Light spot diameter =7mm, 500mm distance from the LCD surface to the detector lens.
Measurement instrument is Topcon’s luminance meter BM-7.
A A
P1 P2
P4 P3
P5
HB
B
V
Figure 3. Definition of viewing angle
Down
Φ=270
(6:00)
θ=0
Up
Φ=90
(12:00)
Left
Φ=180
(9:00)
θ
ΦRight
Φ=0
(3:00)
x
z
y
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Logic Technologies Part Number : LTTD240320035-L4-TF Issue Date : 16.10.2012 Version : 1.0
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INTERFACE DESCRIPTION
TFT interface description
Pin Symbol I/O Description Note
1 LEDA P Power supply for LED (High voltage) 2 GND P Ground 3 LEDK P Power supply for LED (Low voltage) 4 GND P Ground 5 VSHD P Power supply for digital 6 GND P Ground 7 GND P Ground 8 GND P Ground 9 VSYNC I Vertical synchronization in RGB mode 10 GND P Ground 11 RESET I Reset (Low active) 12 GND P Ground 13 GND P Ground 14 GND P Ground 15 CS I Chip select input (low enable) 16 GND P Ground 17 SDO O Serial output signal 18 SDI I Serial input signal 19 GND P Ground 20 SCL I Serial clock 21 GND P Ground 22 B5 I Blue data input (MSB) 23 B4 P Blue data input 24 B3 I Blue data input 25 B2 I Blue data input 26 B1 I Blue data input 27 B0 I Blue data input (LSB) 28 ENAB I Data enable in RGB mode 29 GND P Ground 30 HSYNC I Horizontal synchronise signal 31 GND P Ground 32 DCLK I Dot clock signal for RGB I/F 33 GND P Ground 34 G5 I Green data input (MSB) 35 G4 P Green data input
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Logic Technologies Part Number : LTTD240320035-L4-TF Issue Date : 16.10.2012 Version : 1.0
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36 G3 I Green data input 37 G2 I Green data input 38 G1 I Green data input 39 G0 I Green data input (LSB) 40 GND P Ground 41 R5 I Red data input (MSB)
42 R4 P Red data input
43 R3 I Red data input
44 R2 I Red data input
45 R1 I Red data input
46 R0 I Red data input (LSB)
47 GND P Ground
48 GND P Ground
49 GND P Ground
50 GND P Ground
I -Input only; O -Output only; I/O -Input /output; P -Power or Ground.
Note: Suggested connector is HIROSE FH12-50S-0.5SH or equal.
BLOCK DIAGRAM
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Logic Technologies Part Number : LTTD240320035-L4-TF Issue Date : 16.10.2012 Version : 1.0
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TIMING CHARACTERISTICS
Display Serial Interface Timing Characteristics (3-line SPI system)
Signal Symbol Parameter min max Unit Description
SCL
tscycw Serial Clock Cycle (Write) 100 - ns
tshw SCL “H” Pulse Width (Write) 40 - ns
tslw SCL “L” Pulse Width (Write) 40 - ns
tscycr Serial Clock Cycle (Read) 150 - ns
tshr SCL “H” Pulse Width (Read) 60 - ns
tslr SCL “L” Pulse Width (Read) 60 - ns
SDA / SDI
(Input)
tsds Data setup time (Write) 30 - ns
tsdh Data hold time (Write) 30 - ns
SDA / SDO
(Output)
tacc Access time (Read) 10 - ns
toh Output disable time (Read) 10 50 ns
CSX
tscc SCL-CSX 20 - ns
tchw CSX “H” Pulse Width 40 - ns
tcss CSX-SCL Time
60 - ns
tcsh 65 - ns
Note: Ta = 25 °C, VDDI=1.65V to 3.3V, VCI=2.5V to 3.3V, AGND=VSS=0V
tr≦15ns
70%
30%
70%
30%
tf≦15ns
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Parallel 18/16/6-bit RGB Interface Timing Characteristics
trgbftrgbr
tSYNCS
VIH
VIL
tENS tENH
trgbrtrgbf
tPDHtPDS
tCYCD
PWDL PWDH
VIH
VIH
VIH VIH
VIH VIH
VIH
VIL VIL
VIL
VIL
VIL
VIL
VSYNCHSYNC
ENABLE
Write Data
DOTCLK
D[17:0]
Signal Symbol Parameter min max Unit Description
VSYNC /
HSYNC
tSYNCS VSYNC/HSYNC setup time 15 - ns
18/16-bit bus RGB
interface mode
tSYNCH VSYNC/HSYNC hold time 15 - ns
DE tENS DE setup time 15 - ns
tENH DE hold time 15 - ns
D[17:0] tPOS Data setup time 15 - ns
tPDH Data hold time 15 - ns
DOTCLK
PWDH DOTCLK high-level period 15 - ns
PWDL DOTCLK low-level period 15 - ns
tCYCD DOTCLK cycle time 100 - ns
trgbr , trgbf DOTCLK,HSYNC,VSYNC rise/fall time - 15 ns
VSYNC /
HSYNC
tSYNCS VSYNC/HSYNC setup time 15 - ns
6-bit bus RGB
interface mode
tSYNCH VSYNC/HSYNC hold time 15 - ns
DE tENS DE setup time 15 - ns
tENH DE hold time 15 - ns
D[17:0] tPOS Data setup time 15 - ns
tPDH Data hold time 15 - ns
DOTCLK
PWDH DOTCLK high-level pulse period 15 - ns
PWDL DOTCLK low-level pulse period 15 - ns
tCYCD DOTCLK cycle time 100 - ns
trgbr , trgbf DOTCLK,HSYNC,VSYNC rise/fall time - 15 ns
Note: Ta = -30 to 70 °C, VDDI=1.65V to 3.3V, VCI=2.5V to 3.3V, AGND=VSS=0V
tr≦15ns
70%
30%
70%
30%
tf≦15ns
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CSX timings :
Note: Logic high and low levels are specified as 30% and 70% of VDDI for Input signals.
Write to read or read to write timings:
Note: Logic high and low levels are specified as 30% and 70% of VDDI for Input signals.
CSX
WRX,RDX
Min. 5nstcsf
tchw
twrhtrdh
trdhfm
CSX
WRX
RDX
‘0’
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RELIABILITY TESTING
NO. Item Condition Criteria
1 High Temperature Operating 70°C +/-2°C, 240Hrs IEC60068-2-1, GB2423.2
2 Low Temperature Operating -20°C +/-2°C, 240Hrs IEC60068-2-1 GB2423.1
3 High Temperature Storage 80°C +/-2°C, 240Hrs IEC60068-2-1 GB2423.2
4 Low Temperature Storage -30°C +/-2°C, 240Hrs IEC60068-2-1 GB2423.2
5 Hi Temperature & High Humidity Operation 50°C, 90%RH max, 240Hrs IEC60068-2-78
GB/T2423.3
6 Vibration (non operating)
Frequency range:10~55Hz, Stroke:1.5mm Sweep:10Hz~55Hz~10Hz2hours for each direction of
x.y.z (6 hours for total)
IEC60068-2-6 GB/T2423.10
7 Package Vibration Test
Random Vibration: 0.015GxG/Hz for 5-200Hz, -6dB/Octave from 200-500Hz 2 hours for each direction of
X,Y,Z(6 hours for total)
IEC60068-2-34 GB/T2423.11
8 Thermal Shock (non operating)
-30°C to 30min to 80℃, 30min Change time: 5min, 100 cycles
Start with cold temperature, End with high temperature,
IEC60068-2-14:1984,GB2423.22
9 Drop Test (packaged)
Height:80 cm,1 corner, 3 edges, 6 surfaces
IEC60068-2-32 GB/T2423.8
10 Shock (non-operation) 80G 6ms, ±X,±Y,±Z 3 times for each direction
IEC60068-2-27 GB/T2423.5
11 ESD (operation) C=150pF,R=330Ω,
Air:±15Kv, Contact:±8Kv, 10times/terminal
IEC61000-4-2 GB/T17626.2
Notes:
1. Test samples are applied to one test item.
2. Samples for each test item are 2-10pcs.
3.
4. (a) In the case of a malfunction caused by ESD damage, if the LCM returns to normal state after reset, the item is considered to have passed the ESD test.
(b) It is recommended to use an anti-static blower (ioniser) to reduce the electro-static voltage in the working area.
(c) When removing the protection film from the TFT panel, peel off the film slowly (more than 1sec) while blowing the ioniser towards the peeling area to minimize ESD. This will reduce the risk of damaging the electrical circuitry.
5. In operating test, please use the automatic pictures changes test mode or automatic pictures changes on demonstration box.
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Logic Technologies Part Number : LTTD240320035-L4-TF Issue Date : 16.10.2012 Version : 1.0
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INSPECTION CRITERIA
This specification is designed to be used as the standard acceptance/rejection criteria for normal LCM products.
1. Sampling plan.
The sampling plan according to GB/T 2828.1-2003 / ISO2859-16 1999 and ANSI/ASQC Z1.4 1993, normal level 2 and based on:
Major defect: AQL 0.65 Minor defect: AQL 1.5
2. Inspection condition
The viewing distance for cosmetic inspection is approximately 30cm with the
naked eye, and under an environment of 20-40W light intensity, in all directions, within 45° against a perpendicular line. (Normal temperature 20-25°C and normal humidity 60+/-15 RH.)
Driving voltage - The Vop value from which the most optimal contrast can be obtained
near the specified Vop in the specification (within +/-0.5V of the typical value at 25°C.)
3. Definition of inspection zone in LCD. Figure 4
Zone A : Active Area Zone B : Viewing Area except Zone A (Zone A + Zone B = Minimum viewing area) Zone C : Outside Viewing Area (invisible area after assembling into customer’s product.
Figure 4 inspection zones in an LCD
Note: As a general rule visual defects in Zone C are permissible when there is no visual effect once assembled into the customer’s product.
INSPECTION STANDARD
MAJOR CRITERIA
Item No Item to be inspected Inspection standard Classification
1 All functional defects
1) No display 2) Display abnormal 3) Missing vertical or horizontal segment 4) Short circuit 5) Backlight not working, flickering and abnormal light
Major 2 Missing Missing component
3 Outline dimension Overall outline dimension beyond the drawing dimension is not allowed
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COSMETIC CRITERIA
No. Item Judgment Criteria Partition 1 Difference in Spec. None allowed Major 2 Pattern peeling No substrate pattern peeling and floating Major 3 Soldering defects No soldering missing
No soldering bridge No cold soldering
Major Major Minor
4 Resist flaw on substrate Invisible copper foil (0.5mm or more) on substrate pattern Minor 5 Accretion of metallic Foreign
matter No soldering dust No accretion of metallic foreign matters (Not exceed 0.2mm)
Minor Minor
6 Stain No stain to spoil cosmetic badly Minor 7 Plate discoloring No plate fading, rusting and discoloring Minor 8 Solder amount
1. Lead parts
a. Soldering side of PCB Solder to form a ‘Filet’ all around the lead. Solder should not hide the lead form perfectly. (too much) b. Components side ( In case of ‘Through Hole PCB’ ) Solder to reach the Components side of PCB.
Minor
2. Flat packages Either ‘toe’ (A) or ‘heal’ (B) of the lead to be covered by ‘Filet’. Lead form to be assume over solder.
Minor
3. Chips (32) H h (12) H
Minor
9 Solder ball/solder splash a) The spacing between solder ball and the conductor or solder pad h 0.13mm. The diameter of the solder ball d 0.15mm. b) The quantity of solder balls or solder splashes isn’t more than 5 in 600mm2. c) Solder balls / splashes do not violate minimum electrical clearance d) Solder balls/splashes must be not be able to be dislodged with normal product usage
Minor
Minor
Major Minor
COSMETIC CRITERIA (non-operating)
No. Defect Judgment Criteria Classification 1 Spots In accordance with Screen Cosmetic Criteria (Operating) No.1. Minor 2 Lines In accordance with Screen Cosmetic Criteria (Operating) No.2. Minor 3 Bubbles in polarizer
Minor
4 Scratch In accordance with spots and lines operating cosmetic criteria. When the light reflects on the panel surface, the scratches are not to be remarkable.
Minor
5 Allowable density Above defects should be separated more than 30mm each other. Minor 6 Coloration Not to be noticeable coloration in the viewing area of the LCD panels.
Back-lit type should be judged with back-lit on state only. Minor
7 Contamination Not to be noticeable. Minor
H h
A B
Size : d mm Acceptable Qty in active area d 0.3 Disregard
0.3 d 1.0 3 1.0 d 1.5 1 1.5 d 0
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COSMETIC CRITERIA (operating)
No. Defect Judgment Criteria Classification 1 Spots
A) Clear Note : Including pin holes and defective dots which must be within one pixel size. B) Unclear
Minor
2 Lines
A) Clear Note :( ) - Acceptable Qty in active area L - Length (mm) W - Width (mm) - Disregard B) Unclear
Minor
3 Rubbing line Not to be noticeable. 4 Allowable density Above defects should be separated more than 10mm each other. Minor 5 Rainbow Not to be noticeable. Minor 6 Dot size To be 95 105 of the dot size (Typ.) in drawing.
Partial defects of each dot (ex. pin-hole) should be treated as ‘spot’. (see Screen Cosmetic Criteria (Operating) No.1)
Minor
Size : d mm Acceptable Qty in active area d 0.1 Disregard
0.1 d 0.2 6 0.2 d 0.3 2 0.3 d 0
Size : d mm Acceptable Qty in active area d 0.2 Disregard
0.2 d 0.5 6 0.5 d 0.7 2 0.7 d 0
2.0
L 10.0
See No. 1
(6)
(0)
W 0.5 0.3 0.05
2.0
L 5.0
See No. 1
(6)
(0)
W 0.1 0.05 0.02
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Logic Technologies Part Number : LTTD240320035-L4-TF Issue Date : 16.10.2012 Version : 1.0
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7 Uneven brightness (only back-lit type
module)
Uneven brightness must be BMAX BMIN 2 - BMAX : Max. value by measure in 5 points - BMIN : Min. value by measure in 5 points Divide active area into 4 vertically and horizontally. Measure 5 points shown in the following figure.
Minor
Note : (1) Size : d = (long length short length) 2 (2) The limit samples for each item have priority. (3) Complex defects are defined item by item, but if the number of defects are defined in above table, the total number should not exceed 10. (4) In case of ‘concentration’, even the spots or the lines of ‘disregarded’ size should not allowed. Following three situations should be treated as ‘concentration’. - 7 or over defects in circle of 5mm. - 10 or over defects in circle of 10mm. - 20 or over defects in circle of 20mm. PRECAUTIONS FOR USING LCD MODULES
HANDLING PRECAUTIONS
(1) The display panel is made of glass. Do not subject it to a mechanical shock by dropping it or impact. (2) If the display panel is damaged and the liquid crystal substance leaks out, be sure not to get any in your mouth. If the substance contacts your skin or clothes, wash it off using soap and water. (3) Do not apply excessive force to the display surface or the adjoining areas since this may cause the color tone to vary. (4) The polarizer covering the display surface of the LCD module is soft and easily scratched. Handle this polarizer carefully. (5) If the display surface becomes contaminated, breathe on the surface and gently wipe it with a soft dry cloth. If it is heavily contaminated, moisten cloth with one of the following solvents:
- Isopropyl alcohol - Ethyl alcohol
(6) Solvents other than those above-mentioned may damage the polarizer. Especially, do not use the following.
- Water - Ketone - Aromatic solvents
(7) Exercise care to minimize corrosion of the electrode. Water droplets, moisture condensation or current flow in a high-humidity environment, accelerate corrosion of the electrodes.
: Measuring points
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Logic Technologies Part Number : LTTD240320035-L4-TF Issue Date : 16.10.2012 Version : 1.0
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(8) Install the LCD Module by using the mounting holes. When mounting the LCD module ensure it is free of twisting, warping or distortion.
(9) Do not attempt to disassemble the LCD module. (10) NC terminal should be open. Do not connect anything. (11) If the logic circuit power is off, do not apply the input signals. (12) To prevent destruction of the elements by static electricity, be careful to maintain an optimum
work environment. - Be sure to ground the body when handling the LCD modules. - Tools required for assembling, such as soldering irons, must be properly grounded. - To reduce the amount of static electricity generated, do not conduct assembling and other work under dry conditions.
- The LCD module is coated with a film to protect the display surface. Exercise care when peeling off this protective film since static electricity may be generated.
STORAGE PRECAUTIONS
When storing the LCD modules, the following precaution is necessary. (1) Store them in a sealed polyethylene bag. If properly sealed, there is no need for the dessicant. (2) Store them in a dark place. Do not expose to sunlight or fluorescent light, keep the temperature
between 0°C and 35°C, and keep the relative humidity between 40%RH and 60%RH. (3) The polarizer surface should not come in contact with any other objects. (We advise you to store them in the anti-static electricity container in which they were shipped.
OTHERS
Liquid crystals solidify under low temperature (below the storage temperature range) leading
to defective orientation or the generation of air bubbles (black or white). Air bubbles may also be generated if the module is subject to a low temperature.
If the LCD modules have been operating for a long time showing the same display patterns, the display patterns may remain on the screen as ghost images and a slight contrast irregularity may also appear. A normal operating status can be regained by suspending use for some time. It should be noted that this phenomenon does not adversely affect performance reliability.
To minimize the performance degradation of the LCD modules resulting from destruction caused by static electricity etc., exercise care to avoid holding the following sections when handling the modules.
- Exposed area of the printed circuit board. - Terminal electrode sections. PRECAUTIONS FOR SOLDERING THE LCM
Manual Soldering Machine Drag Soldering Machine Pre-soldering Non
ROHS Product
290°C ~ 350°C Speed : 3 ~ 5 mm/s
330°C ~ 350°C Speed : 4 ~ 8mm/s
300°C ~ 330°C Time : 3 ~ 6S
Pressure : 0.8 to 1.2Mpa
RoHS Product
340°C ~ 370°C Time : 3 ~ 5S.
350°C ~ 370°C Time : 4 ~ 8 mm/S.
330°C ~ 360°C Time : 3 ~ 6S.
Pressure : 0.8 ~ 1.2Mpa.
(1) If solder flux is used, be sure to remove any remaining flux after finishing the soldering process. (This does not apply in the case of a non-halogen type of flux.) It is recommended that your protect the LCD surface with a cover during the soldering process to prevent any damage due to the flux sparks.
(2) When soldering a backlight panel and PCB, the panel and PCB should not be detached more than 3 times. The temperature determines this number and time conditions as mentioned in the above table, although there may be some variance depending on the actual temperature of the soldering iron.
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Logic Technologies Part Number : LTTD240320035-L4-TF Issue Date : 16.10.2012 Version : 1.0
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(3) When removing a backlight panel from the PCB, ensure the solder has completely melted, otherwise the solder pads on the backlight panel and/or PCB may be damaged.
OPERATION CAUTION (1) It is recommended to drive LCDs within their specified voltage limit since the higher voltage than the upper limit shortens the LCD life. An electrochemical reaction due to direct current causes the LCD to deteriorate. Therefore, avoid the use of direct current drive.
(2) Response time will be extremely delayed at lower temperatures than the operating temperature range. At higher temperatures LCD’s will experience a dark color. However those phenomena do not mean a malfunction or the LCD’s. Once the LCDs are returned to the specified operating temperature
range, the response time and colouration should return to the normal state. (3) If the display area is physically pressed hard during it’s operation, some pixels may be abnormally displayed, but should return to their normal condition after resetting the LCM. (4) Moisture sitting on the LCM terminals is a cause for an electro-chemical reaction resulting in a terminal open circuit. Usage under the relative condition of 40°C , 50%RH or less is therefore required.
SAFETY (1) It is recommended to crush any damaged or unnecessary LCDs into pieces and wash off the
liquid crystal by using solvents such as acetone and ethanol, which should then be burned up later.
(2) When any liquid crystal has leaked out of a damaged glass cell and comes in contact with skin, please wash it off well with soap and water.
WARRANTY
Unless otherwise agreed between Logic Technologies Ltd and the customer, Logic Technologies will replace or repair any of its products that are found to be functionally defective when inspected in accordance with Logic Technologies’ acceptance criteria (copies available upon request) for a period of one year from date of shipment. Cosmetic/visual defects must be returned to Logic Technologies within 90 days of shipment. Confirmation of such date shall be based on freight documents. The warranty liability of Logic Technologies is limited to the repair and/or replacement on the terms set forth above. Logic Technologies will not be responsible for any subsequent or consequential losses and/or events.
RETURNING PRODUCTS UNDER WARRANTY No warranty can be granted if the precautions stated above have been disregarded. The typical examples of violations are: - Broken LCD glass. - PCB eyelet’s damaged or modified. - PCB conductors damaged. - Circuit modified in any way, including addition of components. - PCB tampered with by grinding, engraving or painting varnish. - Soldering to or modifying the bezel in any manner. Product repairs will be invoiced to the customer upon mutual agreement. Products must be returned with sufficient description of the failures and/or defects. Any connectors or cable installed by the customer must be removed completely without damaging the PCB eyelet’s, conductors and terminals.
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